What's your favourite version of 'Lady Marmalade'? Is it Labelle's 1975 classic? Christina Aguilera et al's 2001 version? Erm, All Saints' one?
Handily Christina and Patti LaBelle have finally got round to teaming up for a generation-spanning performance of the track again.
Patti was helping the singer advise her team on The Voice when the pair broke into a duet.
They last teamed up for a performance of the track at the 2002 Grammy Awards accompanied by Pink, Lil' Kim, Mya and Missy Elliott.
In other 'Lady Marmalade' news, First Lady Michelle Obama has basically created the 2016 equivalent of the track.
Listen to both versions of 'Lady Marmalade' below:
